Start with 38ch with hook 5.
Foundation row: with hook 4: work 1dc (double crochet) into 2nd ch from hook, 1dc in each of the next 7ch, with hook 5: work *1tr (treble) into next ch, 1dc into next ch* rep (repeat) from *to* into each of the next 14ch, 1tr into next ch, with hook 4: work 1dc into each of the next 12ch, turn.Row 1: with hook 4: work 1 turning ch, 1dc into back loop only of each of the next 12dc (rib sts for top of calf), with hook 5: work 1dc into first tr, 1tr into next dc, *1dc into next tr, 1tr into next dc* rep from*to* into each of the next 12sts, 1dc into next tr, with hook 4: work 1dc into back loop only of each of the next 8dc (rib sts for ankle), turn.

Row 2: with hook 4: work 1 turning ch, 1dc into back loop only of the next 8dc, with hook 5: work 1tr into first dc, 1dc into next tr, *1tr into next dc, 1dc into next tr* rep from*to* into each of the next 12sts, 1tr into next dc, with hook 4: work 1dc into back loop only of the next 12dc, turn.

Repeat row 1 + row 2, 16 times (32 rows in all) until 20cm long.
Fasten off leaving a tail of about 1.25m. Sl st (slip stitch) together to make up on the inside.
Weave in ends. Turn inside out.